from pydantic import BaseModel, Field
from sqlalchemy import ForeignKey, String
from sqlalchemy.orm import Mapped, mapped_column, relationship, Session
from app.models.main import Base

class PlumbingBase(BaseModel):

    plumb_id:int | None = Field(default=None)
    group_id: int | None = Field(default=None)
    type: str | None = Field(default=None)
    units: int | None = Field(default=None)
    cost_per_unit: float | None = Field(default=None)
    total : float | None = Field(default=None)
    remarks: str | None = Field(default=None)

class TblPlumbing(Base):
    __tablename__ = "tbl_plumbing"

    plumb_id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    group_id: Mapped[int] = mapped_column(ForeignKey("tbl_group.group_id"), nullable=True)
    type: Mapped[str] = mapped_column(String(50), nullable=False)
    units: Mapped[int] = mapped_column(nullable=False)
    cost_per_unit: Mapped[float] = mapped_column(nullable=False)
    total:Mapped[float] = mapped_column(nullable=False)
    remarks: Mapped[str] = mapped_column(String(120),nullable=False)
    
    group = relationship("TblGroup", back_populates="plumbing")

    @classmethod
    def create(cls, data:PlumbingBase, db: Session) -> "TblPlumbing":
        data_dict = data.model_dump()
        new_entry = cls(**data_dict)
        db.add(new_entry)
        db.flush()
        return new_entry
    
    @classmethod
    def get_by_id(cls, plumb_id: int, db: Session) -> "TblPlumbing | None":
        return db.query(cls).filter(cls.plumb_id == plumb_id).first()